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Long-term results of combined porous tantalum augments and titanium-coated cups for Paprosky type III bone defects in acetabular revision

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Abstract

Purpose

The use of porous tantalum augments and titanium-coated cups in primary total hip arthroplasty (THA) with acetabular defects has shown satisfactory outcomes in our centre. The aim of this study was to report the long-term radiological and clinical outcomes of using this combination for Paprosky type III acetabular bone defects in acetabular revision.

Patients and methods

Between January 2007 and January 2015, 45 patients with Paprosky type III acetabular defects underwent acetabular revision using a combination of porous tantalum augments and titanium-coated cups. Among these, 41 patients (41 hips) had complete follow-up. Thirty-one patients had a Paprosky type IIIA defect, and ten patients had a Paprosky type IIIB defect. No patients had pelvic discontinuity. There were 20 males and 21 females with an average age of 63.2 years (range 35–80) at the time of revision surgery.

Results

The mean follow-up was 122.8 months (range 69–165). The Harris Hip Score (HHS) improved significantly from 32.1 points (range 17–58) pre-operatively to 85.3 points (63–98) at the last follow-up. The Short Form-12 (SF-12) and Hip Dysfunction and Osteoarthritis Outcome Score (HOOS) improved significantly for each item at the last follow-up. Two patients had a high hip centre post-operatively. One patient had recurrent dislocation but did not require re-revision. No further revision of the acetabular components was required, and all hips remained stable at the last follow-up with bony ingrowth of the acetabular components according to the criteria of Moore et al.

Conclusion

The combination of tantalum augments and conventional titanium-coated cups achieved satisfactory long-term radiographic and clinical outcomes for Paprosky type III acetabular bone defects without pelvic discontinuity.

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Acknowledgements

We would like to thank the relevant staff for guidance and assistance, and for their support and collaboration in our hospital. We thank the patients in this study.

Funding

The study was funded by Key Research & Development program of Science & Technology Department of Sichuan Province (No. 2018SZ0255).

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Authors and Affiliations

Authors

Contributions

Z-K. Z and F-X. P conceived and designed this study; QX and BX collected the data; QX, KZ, and M-C. Y performed the statistical analysis; QX wrote the manuscript; QX, BX, KZ, T-X. L, and Z-K. Z revised this manuscript. All authors reviewed the final manuscript. All authors agree to be accountable for all aspects of the work.

Corresponding author

Correspondence to Zongke Zhou.

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The study protocol was approved by the ethics committees of West China Hospital, Sichuan University.

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The authors declare no competing interests.

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Xiao, Q., Xu, B., Zhou, K. et al. Long-term results of combined porous tantalum augments and titanium-coated cups for Paprosky type III bone defects in acetabular revision. International Orthopaedics (SICOT) 45, 1699–1706 (2021). https://doi.org/10.1007/s00264-021-05075-5

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